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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A136489 Triangle T(n, k) = 3*A007318(n, k) - 2*A034851(n, k).

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 4
5 1
6 1
7 5
8 5
9 1
10 1
11 8
12 10
13 8
14 1
15 1
16 9
17 18
18 18
19 9
20 1
21 1
22 12
23 27
24 40
25 27
26 12
27 1
28 1
29 13
30 39
31 67
32 67
33 39
34 13
35 1
36 1
37 16
38 52
39 112
40 134
41 112
42 52
43 16
44 1
45 1
46 17
47 68
48 164
49 246
50 246
51 164
52 68
53 17
54 1
55 1
56 20
57 85
58 240
59 410
60 504
61 410
62 240
63 85
64 20
65 1

List of values

[1, 1, 1, 1, 4, 1, 1, 5, 5, 1, 1, 8, 10, 8, 1, 1, 9, 18, 18, 9, 1, 1, 12, 27, 40, 27, 12, 1, 1, 13, 39, 67, 67, 39, 13, 1, 1, 16, 52, 112, 134, 112, 52, 16, 1, 1, 17, 68, 164, 246, 246, 164, 68, 17, 1, 1, 20, 85, 240, 410, 504, 410, 240, 85, 20, 1]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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